{"id":9205,"date":"2022-01-18T15:10:00","date_gmt":"2022-01-18T13:10:00","guid":{"rendered":"https:\/\/lncmi.cnrs.fr\/?p=9205"},"modified":"2025-07-07T11:07:41","modified_gmt":"2025-07-07T09:07:41","slug":"magnetism-and-superconductivity-in-ute2-under-high-pressure-and-high-magnetic-field","status":"publish","type":"post","link":"https:\/\/lncmi.cnrs.fr\/en\/news\/magnetism-and-superconductivity-in-ute2-under-high-pressure-and-high-magnetic-field\/","title":{"rendered":"Magnetism and superconductivity in UTe2 under high pressure and high magnetic field"},"content":{"rendered":"\n<p>The discovery of superconductivity in the heavy-fermion paramagnet UTe<sub>2<\/sub> has attracted a lot of attention, particularly due to the reinforcement of superconductivity near quantum phase transitions induced by magnetic field and\/or pressure [Ran et al. Science <strong>365<\/strong>, 684 (2019), Aoki et al., arXiv:2110.10451]. In this system, hydrostatic pressure induces an enhancement of the superconducting temperature by a factor 2, reaching about 3 K [Braithwaite et al, Commun. Phys. <strong>2<\/strong>, 147 (2019)]. The effect of magnetic field on the ambient pressure superconductivity is also very unusual, with the superconducting critical field exceeding 60 T for certain directions of applied field [Ran et al. Nat. Phys. <strong>15<\/strong>, 1250 (2019), Knafo et al., Commun. Phys. <strong>4<\/strong>, 40 (2021)].<\/p>\n\n\n\n<p>In collaboration with researchers at CEA in Grenoble and Charles University in Prague, scientists at LNCMI investigated the electrical resistivity of UTe<sub>2<\/sub> under pressure up to 3 GPa and pulsed magnetic fields up to 58 T along the hard magnetic crystallographic directions <strong>b<\/strong> and <strong>c<\/strong>. They constructed three-dimensional phase diagrams showing a complete reshuffling of the magnetic anisotropy and strong associated effects on superconductivity. Near the critical pressure, a field-enhancement of superconductivity coincides with a boost of the effective mass near field-induced quantum magnetic instabilities. By bringing new elements about the interplay between magnetism and superconductivity, this paper appeals for microscopic theories describing the anisotropic properties of UTe<sub>2<\/sub> under pressure and magnetic field.<\/p>\n\n\n\n<p><strong>Publication \u2013 <\/strong><strong>Magnetic reshuffling and feedback on superconductivity in UTe<sub>2<\/sub> under pressure<\/strong><br>M. Valiska, W. Knafo, G. Knebel, G. Lapertot, D. Aoki, and D. Braithwaite<\/p>\n\n\n\n<p><a href=\"https:\/\/doi.org\/10.1103\/PhysRevB.104.214507\">Phys. Rev. B <strong>104<\/strong>, 214507 (2021).<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"605\" src=\"https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2022\/01\/knafo-768x605-1.png\" alt=\"\" class=\"wp-image-23196\" srcset=\"https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2022\/01\/knafo-768x605-1.png 768w, https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2022\/01\/knafo-768x605-1-480x378.png 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 768px, 100vw\" \/><\/figure>\n\n\n\n<p><strong>Figure:<\/strong> Three-dimensional (<em>p<\/em>,<em>H<\/em>,<em>T<\/em>) phase diagrams and evolution of the Fermi-liquid coefficient <em>A<\/em> in the low-temperature (<em>p<\/em>,<em>H<\/em>) planes of UTe<sub>2<\/sub> in magnetic fields applied along <strong>b<\/strong> and <strong>c<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The discovery of superconductivity in the heavy-fermion paramagnet UTe2 has attracted a lot of attention, particularly due to the reinforcement of superconductivity near quantum phase transitions induced by magnetic field [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23196,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[292],"tags":[],"post_folder":[],"class_list":["post-9205","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"jetpack_featured_media_url":"https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2022\/01\/knafo-768x605-1.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/posts\/9205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/comments?post=9205"}],"version-history":[{"count":0,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/posts\/9205\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/media\/23196"}],"wp:attachment":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/media?parent=9205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/categories?post=9205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/tags?post=9205"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/post_folder?post=9205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}